Amazon.com: Plantronics - Voyager Focus UC with Charge Stand (Poly) - Bluetooth Dual-Ear (Stereo) Headset with Boom Mic - USB-A PC/Mac Compatible - Active Noise Canceling-Works with Teams (Certified), Zoom & more :
B825 Stereo Bluetooth Headset User Manual B825-User Guide Plantronics
poly B825 Voyager Focus UC Headphone User Guide - Manuals+
User manual Plantronics Voyager 8200 UC (English - 15 pages)